JPS609653A - Grinding device for outer surface of molded work - Google Patents

Abstract

PURPOSE:To make the outer surface of a molded work grindable uniformly without entailing any strain deformation, by pushing an abrasive roller to almost one side and a guide roller to the other side centering on a rotary shaft, of the molded work on a cradle rotating one axis. CONSTITUTION:First of all, a molded work A of a wheel cover or the like is set to a cradle 17 and driven for rotation by a motor M, then an air cylinder 10 is set in motion, making rings 22 and 23 go down along a guide bar 11, and an abrasive roller 13 attached to a base plate 12 is pushed to one side of a horizontal plane part a1 of the molded work A while a guide roller 20 pivotally supported on a support frame 19 of the abrasive roller 13 to the other side respectively being pushed uniformly, thus the work A is ground. And, when grinding for the horizontal part a1 is over, the base plate 13 is tilted to some extent with extension in a cylinder 26, and an inclined part of the molded work A is ground in an oblique attitude of both the abrasive roller 13 and the guide roller 20. Thus, no strain deformation is produced on the molded work and, what is more, an outer surface of the molded work can be uniformly ground and highly efficient grinding operation is performable.

Description

DETAILED DESCRIPTION OF THE INVENTION TECHNICAL FIELD The present invention relates to an apparatus for polishing the outer surface of a molded article, which polishes the outer surface of a molded article formed into a plate shape, such as a vehicle wheel.

BACKGROUND ART Conventionally, this type of polishing apparatus (see FIG. 1) has a base frame 3 that moves up and down along a guide bar 2 by the expansion and contraction of the stroke of an air cylinder 1, a polishing roller 4, and a support drum 5 for abrasive paper. The feed roller 6 is attached, and the pedestal 7 of the molded product A is mounted.
is mounted so as to be rotatable on one axis by a rotating shaft 8 of a drive motor (not shown), and the polishing roller 4 moving downward is pressed against the molded product A on the pedestal 7 via abrasive paper, and the pedestal 7 The molded product is rotatably polished by the rotation of the rotor. However, in this polishing device, the drive shaft 8 of the pedestal 7 needs to be machined with ripple-like hair lines on the molded product on the pedestal 7, which rotates on the -axis.
Since the polishing roller 4 is pressed against approximately half of the surface of the molded product A with the center at , there is a risk that pressing force is applied only to one side of the molded product A, deforming the molded product during processing. There is a drawback that the circumferential surface of the polishing roller 4 cannot evenly contact the outer surface of the molded article A, which tends to cause unevenness in the hairline.

In addition, in conventional polishing devices, the polishing roller 4 is simply moved up and down horizontally by the stroke expansion and contraction of the air cylinder 1, and the peripheral edge side is bent downward from the horizontal plane of the center part, such as in a vehicle wheel cover. The outer surface of the molded product A has some drawbacks that cannot be solved unless the surface of each part is polished in a separate process.

DISCLOSURE OF THE INVENTION The present invention provides a molded product polishing device that enables stable and even polishing of the outer surface of a molded product, and that is capable of polishing even a molded product with an inclined surface portion, such as a vehicle wheel cover, including the horizontal surface portion. The purpose is to provide.

That is, in the molded product polishing device according to the present invention, a kite roller is attached to press and support the other half of the molded product, and together with the polishing roller, the molded product is stably pressed from both sides via the rotating shaft of the pedestal. Further, the guide roller is mounted on the support frame of the polishing row and the polishing roller, and the tilting movement of the support frame allows the polishing roller and the guide roller to come into oblique contact with the outer surface of the molded product. The kite roller is attached to the support frame so that it can be freely moved downward [2] The kite roller is configured so that it can suppress and support the molded product even if the support frame is tilted.

The structure of the invention will now be described based on the embodiments shown in FIGS. 2 to 5.

As shown in FIG. 1, this polishing device consists of a base frame 12 that moves up and down along a guide bar 11 by the stroke expansion and contraction of an air cylinder 10, and a polishing roller 13 and an abrasive paper P.
A supporting drum 14, 15 and a feed roller 16, 16 are mounted thereon, and the pedestal 17 for the molded product A is configured to be able to rotate uniaxially by the rotating shaft 18 of the drive motor M. In addition, in this polishing device, a polishing roller 1 made of a rubber roll is used.
The bearing is supported by a support frame 19 mounted on which the roller 3 protrudes horizontally from the base frame 12, and a guide roller 20 is mounted on the protruding end side of the support frame 19 so as to be arranged on the same plane as the polishing roller 13 below. There is. This guide roller 2° comes into contact with the other half of the molded product that is in contact with the polishing roller 13 via the rotating shaft 18 of the pedestal 17, and its bearing is interposed between the holder 20a and the support frame 19. By fitting and arranging the extension spring 21 mounted on the roll support shaft 20b, the roll support shaft 20b is attached so as to be movable up and down. In addition, in this polishing device, a stage plate 24 is hung and fixed between upper and lower rings 22 and 23 that are fitted and arranged on the axis of the guide bar 11, and a bracket 25 of the base plate 12 is supported on the upper ring 22. A driving cylinder 26 is provided on the stage plate 24, which is pivotally mounted and expands and contracts in the horizontal direction in correspondence with the lower ring 23. The drive cylinder 26 has a rod tip pivotally connected to a bracket 27 of the base plate 12, and is configured to tilt and rotate the base plate 12 about the pivot with the upper ring 22 as a fulcrum. Note that the drive cylinder 10 that moves the base plate 12 up and down
is attached by connecting the tip of the rod to the stage plate 24.

Effect of the Invention The polishing apparatus constructed as described above can be used to polish the outer surface of a molded article A such as a wheel cover for a vehicle. The outer surface of the wheel cover consists of a horizontal part a at the center and an obliquely bent slope part a2 at the periphery, and the surface is polished while forming ripple-like hair lines. It is something.

First, the molded product A is placed on the pedestal 17 and rotated by the drive motor M. For the molded product A, the stroke of the air cylinder 10 is extended, and the guide bar 11 is
Move the ring 22° 23 down along the stage plate 24.
By lowering the base plate 12 at the same time, the polishing roller 13 mounted on the base plate 12 is pressed against it. In this pressing contact, the horizontal surface portion a1 of the molded product A that is rotating due to the rotation of the pedestal 17 is polished, and the guide roller 2o attached to the support frame 19 of the polishing roller 13 is The molded product A comes into contact with the other surface of A to suppress and support the molded product A. Therefore, molded product A
is stably supported on the pedestal 17, and the abrasive roller 13, which contacts the surface of the molded product through the abrasive paper P, can be evenly pressed over the entire length.

When the machining of the horizontal surface portion a1 is completed, the drive cylinder 26 is extended in stroke, and the base plate 12 is tilted and rotated about the pivot of the ring 22 so that the lower side thereof protrudes. In the tilt rotation, the horizontally projecting support frame 19 of the base plate 12 is tilted, and the polishing roller 13 attached thereto is tilted. The guide rollers 2o are both moved to the stabbing position. This oblique angle is the slope part a of molded product A.
2, and then the side surface of the polishing roller 13 is pressed against the sloped portion a2 to perform the polishing process. At this time, the guide roller 20 is moved to protrude and deflect due to the extension of the spring 21, so that the polishing roller 13 can polish the slope portion a2 of the molded product A, and the other surface can be suppressed and supported by the kite roller 20. become.

As described above, the molded product polishing apparatus according to the present invention has the following effects:
Since the molded product is stably suppressed and supported by the polishing roller and guide roller, the outer surface of the molded product can be evenly polished with the polishing roll without causing distortion or deformation of the molded product. Since the bent portions can also be polished in the same process, the polishing work can be carried out with high efficiency.

Note that this polishing device can be applied not only to metal molded products but also to the process of plating synthetic resin injection molded products with metal such as chrome.

[Brief explanation of the drawing]

FIG. 1 is a side view of a polishing device according to a conventional example, FIG. 2a is a side view of a polishing device according to the present invention, FIG. 2 is a front view of the same, and FIG. A sectional view of the molded product to be polished, FIG. 3 is a plan view thereof, and FIG. 4 is an operational explanatory diagram of the process of polishing the horizontal portion of the molded product with the polishing device according to the present invention.
FIG. 5 is an explanatory diagram of the operation of the process of polishing the sloped part of a molded product using the same polishing device, 13: polishing roller, 17: pedestal, 19: support frame,
20 guide roller, A: Molded product, P: Abrasive paper. Figure 1 Figure 2 Q Figure 2 Figure 3 Figure 1 Figure 4 Figure 5

Claims (4)

[Claims] (1) - In a device that polishes the outer surface of a molded product on a rotating pedestal by pressing a polishing roller against approximately half of the surface around the rotation axis, the other half of the molded product is suppressed and supported. An apparatus for polishing the outer surface of a molded product, characterized by being equipped with a guide roller. (2) - In a device that polishes the outer surface of a molded product on a rotating pedestal by pressing a polishing roller against approximately half of the surface around the rotation axis, the molded product is attached to the support frame of the polishing roller. A guide roller that presses and supports the other half is attached, and the polishing roller and guide roller can be brought into contact with the outer surface of the molded product diagonally by the tilting movement of the support frame, and the guide roller can be moved up and down by the support frame. A device for polishing the outer surface of a molded product, which is characterized by being freely mounted. (3) The polishing device according to claim 1 or 2, wherein the polishing roller is pressed against the outer surface of the molded product through an abrasive paper. (4) The polishing apparatus according to claim 1 or 2, wherein the polishing roller and the guide roller are mounted so as to be movable up and down.